<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>bootstrap-图片</title>
    <link rel="stylesheet" href="./css/bootstrap.min.css">
</head>
<body>
    <img src="./image/daqiao.jpg" alt="">
    <img src="./image/daqiao.jpg" alt="" class="img-responsive">

    <img src="./image/111.jpg" alt="">
    <img src="./image/111.jpg" alt="" class="img-rounded"><!-- 圆角 -->  
    <img src="./image/111.jpg" alt="" class="img-circle"><!-- 圆 -->
    <img src="./image/111.jpg" alt="" class="img-thumbnail"><!-- 双线 -->
    
    <img src="./image/333.jpg" alt="">
    <img src="./image/222.jpg" alt="" class="img-rounded"><!-- 圆角 -->  
    <img src="./image/333.jpg" alt="" class="img-circle"><!-- 圆 -->
    <img src="./image/222.jpg" alt="" class="img-thumbnail"><!-- 双线 -->

</body>
</html>